feat: Implement Phase 2 cross-cutting services with email and notification enhancements

- Refactor email verification and password reset utilities to use new email service.
- Introduce email delivery queue and notification delivery model for better tracking.
- Enhance file validation and storage services for improved security and ownership management.
- Add cron job for cleaning inactive notifications with retention policy.
- Update document worker to handle document generation and storage more efficiently.
- Implement logging improvements in activity and log workers.
- Create comprehensive documentation for new API endpoints and services.
- Add unit tests for file validation and notification policies to ensure robustness.

app/utils/passwordReset.utill.js

@@ -11,7 +11,7 @@
 
 const crypto = require("crypto");
 const redis = require("../config/redisClient");
-const { sendMail } = require("./mail.util");
+const emailService = require("../services/email/email.service");
 
 const PASSWORD_RESET_TTL =
   Number(process.env.PASSWORD_RESET_TTL_SECONDS) || 900;
@@ -81,23 +81,13 @@ const sendPasswordResetEmail =
       `${process.env.FRONTEND_URL}/reset-password?token=${resetToken}`;
 
 
-    await sendMail({
-      to: email,
-
-      subject:
-        "Reset your ZUMRI password",
-
-      templateName:
-        "passwordReset",
-
-      templateVars: {
+    await emailService.send({
+      recipient: email, templateKey: "passwordReset",
+      variables: {
         firstName: firstName,
         resetLink: resetLink,
         expiryTime: "15 minutes",
-      },
-
-      text:
-        `Hi ${firstName}, use this link within 15 minutes to reset your password: ${resetLink}`,
+      }, eventId: `reset-${hashPasswordResetToken(resetToken)}`,
     });
   };
 
@@ -109,25 +99,15 @@ const sendPasswordResetEmail =
   const changedAt =
     new Date().toLocaleString();
 
-  await sendMail({
-    to: email,
-
-    subject:
-      "Your ZUMRI password was changed",
-
-    templateName:
-      "passwordChanged",
-
-    templateVars: {
+  await emailService.send({
+    recipient: email, templateKey: "passwordChanged",
+    variables: {
       customer_name:
         firstName,
 
       changed_at:
         changedAt,
     },
-
-    text:
-      `Hi ${firstName}, your password was changed at ${changedAt}. If this was not you, contact support immediately.`,
   });
 };